Httpclient POST方法参数为JSON代码实例亲测可用

   /**
    * post请求以及参数是json
    * @param url
    * @param jsonParams
    * @return
    */
   public static JSONObject doPostForJson(String url, String jsonParams, String token) {
       CloseableHttpClient httpClient = HttpClients.createDefault();
       JSONObject jsonObject = null;
       HttpPost httpPost = new HttpPost(url);
       RequestConfig requestConfig = RequestConfig.custom().
               setConnectTimeout(180 * 1000).setConnectionRequestTimeout(180 * 1000)
               .setSocketTimeout(180 * 1000).setRedirectsEnabled(true).build();
       httpPost.setConfig(requestConfig);
       httpPost.setHeader("Content-Type", "application/json");
       httpPost.setHeader("Authorization", token);
       try {
           httpPost.setEntity(new StringEntity(jsonParams, ContentType.create("application/json", "utf-8")));
           System.out.println("request parameters" + EntityUtils.toString(httpPost.getEntity()));
           HttpResponse response = httpClient.execute(httpPost);
           if (response != null && response.getStatusLine().getStatusCode() == 200) {
               String result = EntityUtils.toString(response.getEntity());
               jsonObject = JSONObject.parseObject(result);
               return jsonObject;
           }
       } catch (Exception e) {
           e.printStackTrace();
       } finally {
           if (null != httpClient) {
               try {
                   httpClient.close();
               } catch (IOException e) {
                   e.printStackTrace();
               }
           }
           return jsonObject;
       }
   }
调用实例:
private List<GoalResultVo> getGoalList(Long id) {
       GoalRequestVo vo = new GoalRequestVo();
       JSONObject condition = new JSONObject();
       condition.put("year", 2020);
       condition.put("goalModelId", id);
       condition.put("goalPeriod", 3);
       condition.put("isSum", false);
       condition.put("done", true);
       vo.setCondition(condition);
       String jsonParam = JSON.toJSONString(vo);
       String token = tokenUtil.getAccessToken();
       JSONObject jsonObject = HttpClientUtil.doPostForJson(goalUrl, jsonParam, token);
       JSONObject data = (JSONObject) jsonObject.get("data");
       JSONArray goalProDetails = (JSONArray) data.get("goalProDetails");
       return JSONObject.parseArray(goalProDetails.toJSONString(), GoalResultVo.class);
   }
注意: 平时代码中,可用使用 JSONObject 代替Map来存储对象更方便一些;